Patent US4458460A successfully refreshed from Google Patents.
US4458460A
Expired / Lapsed
US
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Cable module device
Assignee: Walker Systems Inc
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Filing: 1981-05-26
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Granted: 1984-07-10
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Expires: 2001-05-26
Abstract
Abstract A cable module device wherein a grommet plate closes the upper end of the module and, in the absence of high heat, seals and protects the module where, for example, a fire, located away from the module, results in cold smoke and water moving onto the module as from a sprinkler, fire hose, broken pipes, etc. on floor above or same floor as the module. The module is further provided with normally inert heat-sensitive plates which when triggered by a flame expand, to form a barrier in the module against passage therethrough of such excessive heat and flames.
Inventors
- 👤 John E. Kohaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:14
CPC Classifications
E; E04; E04G; E04G15/00; E04G15/06; E04G15/061; F; F16; F16L; F16L5/00; F16L5/02; F16L5/14; H; H02; H02G; H02G3/00; H02G3/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
269 words
A device for enabling cables to be pulled therethrough and through a concrete slab floor in which the device is adapted to be mounted, which device is adapted to be positioned in relation to the floor to be formed, prior to pouring the concrete, such that the device is mounted in the floor after setting of the concrete in the floor, and further adapted to prevent heat transmission through the device, such that the fire rating of the floor with the device mounted therein is substantially the fire rating of the floor without the device mounted therein, to enable the device to be fire-rated, and further adapted to prevent passage of cold smoke or water therethrough, comprising: (a) an elongated hollow housing, generally tubular shaped, the hollow portion of which is adapted to enable the cables to be pulled therethrough, which includes first and second opposed ends, and first and second opposed end sections; (b) means in the first end section of the hollow housing for preventing transmission of heat through the device, such that the fire rating of the floor with the device mounted therein is substantially the fire rating of the floor without the device mounted therein, adapted to enable the cables to be pulled therethrough; and (c) means mounted in the second end section of the housing for preventing the passage of cold smoke or water through the device, comprised of resilient material, adapted to enable the cables to pass therethrough, such that, in the absence of heat, upon pulling cables therethrough, the cables are compressed thereby so as to seal the cables in the device.
Claim 2
Independent Claim
269 words
A device for enabling cables to be pulled therethrough and through a concrete slab floor in which the device is adapted to be mounted, which device is adapted to be positioned in relation to the floor to be formed, prior to pouring the concrete, such that the device is mounted in the floor after setting of the concrete in the floor, and further adapted to prevent heat transmission through the device, such that the fire rating of the floor with the device mounted therein is substantially the fire rating of the floor without the device mounted therein, to enable the device to be fire-rated, and further adapted to prevent passage of cold smoke or water therethrough, comprising: (a) an elongated hollow housing, generally tubular shaped, the hollow portion of which is adapted to enable the cables to be pulled therethrough, which includes first and second opposed ends, and first and second opposed end sections; (b) means in the first end section of the hollow housing for preventing transmission of heat through the device, such that the fire rating of the floor with the device mounted therein is substantially the fire rating of the floor without the device mounted therein, adapted to enable the cables to be pulled therethrough; and (c) means mounted in the second end section of the housing for preventing the passage of cold smoke or water through the device, comprised of resilient material, adapted to enable the cables to pass therethrough, such that, in the absence of heat, upon pulling cables therethrough, the cables are compressed thereby so as to seal the cables in the device.
Claim 3
Dependent Claim
68 words
A device as in claim 1, in which the cold smoke or water passage preventing means comprise a grommet plate, comprised of silicone rubber, which includes openable portions through which the cables may pass, adapted to compress the cables in the openable portions upon opening thereof and passage of the cables therethrough, and further adapted to increasingly seal and compress the cables upon increased heat being applied thereto.
Claim 4
Dependent Claim
111 words
A device as in claim 1, further adapted to enable power and communication cables to be separately pulled therethrough, in which the first end section of the housing further includes a medial barrier portion, extending axially therethrough for substantially the length thereof, adapted to divide the first end section into separate passages to enable the power and communication cables to be separately pulled therethrough so as to shield and isolate the separate cables, in which the heat transmission preventing means comprise a plurality of members comprised of intumescent material, and in which the medial barrier portion is comprised of an intumescent member, mounted in the first end section of the housing.
Claim 5
Dependent Claim
42 words
A device as in claim 1, in which the housing is comprised of a plurality of separate sections, and the device further comprises means mounted between each pair of adjacent housing sections for insulating the sections from the transmission of heat therethrough.
Claim 6
Dependent Claim
60 words
A device as in claim 1, in which the the second end section of the housing includes side walls, and each side wall of one pair of opposed side walls is comprised a plurality of elongated channel sections, each channel section being generally C-shaped and including opposed projecting flange portions adapted to radiate heat surges into the concrete slab floor.
Claim 7
Dependent Claim
53 words
A device as in claim 1, in which the heat transmission preventing means comprise a plurality of members comprised of intumescent material, and in which each intumescent member is wrapped in a sheath comprised of water-proof material and adapted to prevent water passage therethrough and to permit intumescence of the intumescent members therethrough.
Claim 8
Dependent Claim
63 words
A device as in claim 5, further comprising a medial generally Z-shaped member, adapted to extend axially in the second end section of the housing from the medial portion of one channel section to the medial portion of the other opposed channel section, and to interconnect the plurality of elongated channel sections on opposite sides of the second end section of the housing.
References Cited (Backward Citations)
US3087053A
Cited
DE2154841A1
Cited
US3864883A
Cited
US3995102B1
Cited
US3995102A
Cited
US4093818A
Cited
DE2536565A1
Cited
US4136707A
Cited
US4232493A
Cited
US4270318A
Cited
US4272643A
Cited
US4249353A
Cited
US4304079A
Cited
US4324078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |